diff --git a/source/main.cpp b/source/main.cpp
index 115d04f..a7f3f75 100644
--- a/source/main.cpp
+++ b/source/main.cpp
@@ -18,6 +18,7 @@ struct vertex
 	float st[2];
 	float coords[3];
 	float uv[2];
+	float rand[4];
 };
 
 static DVLB_s* vshaderDVLB;
@@ -27,12 +28,13 @@ static s8 sphereColorsUniformLocation;
 static s8 sphereLightsUniformLocation;
 static s8 randUniformLocation;
 
-static constexpr unsigned int VERTEX_COUNT_W = 120;
+static constexpr unsigned int VERTEX_COUNT_W = 150;
 static constexpr unsigned int VERTEX_COUNT_H = 10 * VERTEX_COUNT_W / 6;
 static constexpr unsigned int VERTEX_COUNT = VERTEX_COUNT_W * VERTEX_COUNT_H;
+static constexpr unsigned int INDICES_COUNT = (VERTEX_COUNT * 2 + VERTEX_COUNT_H * 2);
 
 static vertex vertexList[VERTEX_COUNT];
-static u16 vertexIndices[VERTEX_COUNT * 2 + VERTEX_COUNT_H * 2];
+static u16 vertexIndices[INDICES_COUNT];
 
 static void* vboData;
 static void* iboData;
@@ -108,8 +110,6 @@ static C3D_FVec randvec()
 	while (FVec3_Magnitude(out) > 1.0f);
 
 	return out;
-
-	return FVec4_New(0, 0, 0, 0);
 }
 
 static void setupVertices()
@@ -141,12 +141,20 @@ static void setupVertices()
 
 static void setupRandom()
 {
-	constexpr int NUM_RAND = 10;
+	constexpr int NUM_RAND = 20;
 	C3D_FVec* randPtr = C3D_FVUnifWritePtr(GPU_VERTEX_SHADER, randUniformLocation, NUM_RAND);
 	for (int i = 0; i < NUM_RAND; i++)
 	{
 		randPtr[i] = randvec();
 	}
+
+	for (int i = 0; i < VERTEX_COUNT; i++)
+	{
+		vertex& v = static_cast<vertex*>(vboData)[i];
+
+		const C3D_FVec r = randvec();
+		memcpy(v.rand, r.c, sizeof(r.c));
+	}
 }
 
 static void sceneInit()
@@ -186,13 +194,14 @@ static void sceneInit()
 	AttrInfo_AddLoader(attrInfo, 4, GPU_FLOAT, 2);
 	AttrInfo_AddLoader(attrInfo, 5, GPU_FLOAT, 3);
 	AttrInfo_AddLoader(attrInfo, 6, GPU_FLOAT, 2);
+	AttrInfo_AddLoader(attrInfo, 7, GPU_FLOAT, 4);
 
 	iboData = linearAlloc(sizeof(vertexIndices));
 	memcpy(iboData, vertexIndices, sizeof(vertexIndices));
 
 	C3D_BufInfo* bufInfo = C3D_GetBufInfo();
 	BufInfo_Init(bufInfo);
-	BufInfo_Add(bufInfo, vboData, sizeof(vertex), 3, 0x654);
+	BufInfo_Add(bufInfo, vboData, sizeof(vertex), 4, 0x7654);
 
 	C3D_TexEnv* env = C3D_GetTexEnv(0);
 	C3D_TexEnvInit(env);
@@ -222,7 +231,7 @@ static void sceneInit()
 
 static void sceneRender()
 {
-	C3D_DrawElements(GPU_TRIANGLE_STRIP, VERTEX_COUNT * 2 + VERTEX_COUNT_H * 2, C3D_UNSIGNED_SHORT, iboData);
+	C3D_DrawElements(GPU_TRIANGLE_STRIP, INDICES_COUNT, C3D_UNSIGNED_SHORT, iboData);
 }
 
 static void sceneExit()
diff --git a/source/vshader.v.pica b/source/vshader.v.pica
index 5348425..f6a27ce 100644
--- a/source/vshader.v.pica
+++ b/source/vshader.v.pica
@@ -1,13 +1,14 @@
 .constf myconst(0.0, 1.0, 0.001, 1000.0)
-.constf myconst2(0.5, 999.0, 1.1, 0.0)
+.constf myconst2(0.5, 999.0, 1.1, 2.0)
 .alias zeros myconst.xxxx
 .alias halfs myconst2.xxxx
 .alias ones myconst.yyyy
+.alias twos myconst2.wwww
 .alias tooclose myconst.zzzz
 .alias far myconst.wwww
 .alias noHit myconst2.yyyy
 
-.consti bounceLoopParams(9, 0, 1, 0)
+.consti bounceLoopParams(19, 0, 1, 0)
 .consti calcSphereLoopParams(3, 0, 1, 0)
 
 .setb b0 true
@@ -24,7 +25,7 @@
 .fvec sphereLights[4]
 
 ; random numbers
-.fvec rand[10]
+.fvec rand[20]
 
 .in inOrigin v0
 .in inLowerLeftCorner v1
@@ -33,6 +34,7 @@
 .in inST v4
 .in inPos v5
 .in inUV v6
+.in inRand v7
 
 .out outPos position
 .out outUV texcoord0
@@ -57,7 +59,10 @@
 	; calculate light bounces
 	for bounceLoopParams
 		; setup random numbers for this iteration
-		mov r11, rand[aL]
+		mul r11, rand[aL], inRand
+		dp3 r6.x, r11, r11
+		rsq r6.x, r6.x
+		mul r11.xyz, r6.xxx, r11.xyz
 
 		; reset max ray distance
 		mov r4.w, far
@@ -94,7 +99,7 @@
 		mov r1.xyz, r5.xyz
 
 		; set r2 to new ray direction
-		call diffuse
+		call metallic
 	.end
 
 	labl:
@@ -133,7 +138,6 @@
 ; Temporaries
 ; -----------
 ;   r5.xyz:   new origin
-;   r6.xyz:   new direction
 ;   r7.xyz:   hit normal
 ;   r8.xyzw:  used for calculations
 ;   r9.xyzw:  used for calculations
@@ -231,4 +235,12 @@
 
 .proc diffuse
 	add r2.xyz, r7.xyz, r11.xyz
+.end
+
+.proc metallic
+	dp3 r6.xyz, r2, r7
+	mul r6.xyz, twos, r6.xyz
+	mad r2.xyz, -r6.xyz, r7.xyz, r2.xyz
+	; add a bit of random "fuzziness" to the metal?
+	mad r2.xyz, r11.xyz, r11.w, r2.xyz
 .end
\ No newline at end of file